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Hubble, Chandra, Jansky VLA Telescopes Collaborate on Galaxy Cluster

Hubble, Chandra, Jansky VLA Telescopes Collaborate on Galaxy Cluster

In October 2013 Hubble kicked off the Frontier Fields program, targeting six massive galaxy clusters, enormous collections of hundreds or even thousands of galaxies. MACS J0717, shown here, is one of the most complex galaxy clusters known, the result of four galaxy clusters colliding.